Testing method and testing apparatus for splicing screens

Patent metadata

Field	Value
Publication number	US-10334243-B2
Application number	US-201515122702-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Jun 12, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A testing method and a testing apparatus for splicing screens (1, 2, 3, 4) are provided. The method includes: outputting an image signal to a display screen, wherein the display screen includes a plurality of splicing screens (1, 2, 3, 4), the image signal includes a plurality of testing sub pictures, the testing sub pictures are arranged correspondingly to the splicing screens (1, 2, 3, 4) so as to enable the splicing screens (1, 2, 3, 4) to display the corresponding testing sub pictures, and the testing sub pictures include testing contents (5, 6, 7, 8, 9, 10, 11, 12); and testing the splicing screens (1, 2, 3, 4) through the testing contents (5, 6, 7, 8, 9, 10, 11, 12). Testing on the splicing screens (1, 2, 3, 4) is achieved, and a testing result can be used for regulating the splicing screens (1, 2, 3, 4), so that defects generated in the displaying process of the splicing screens (1, 2, 3, 4) are reduced.

First claim

The invention claimed is:

1. A testing method for splicing screens, comprising:
outputting an image signal to a display screen, wherein the display screen includes a plurality of splicing screens, the image signal includes a plurality of testing sub pictures, the testing sub pictures are arranged correspondingly to the splicing screens so as to enable the splicing screens to display the corresponding testing sub pictures, and the testing sub pictures include testing contents; and
testing the splicing screens through the testing contents,
wherein the testing contents of the testing sub picture include a four-corner test graph, and one vertex angle of the four-corner test graph coincides with one vertex angle of an active display region of the splicing screen corresponding to the testing sub picture; and
the testing the splicing screens through the testing contents includes:
determining a distortion of the four-corner test graph;
acquiring a vertical distance between a vertex of the vertex angle of the four-corner test graph and a horizontal line of the vertex angle of the active display region, multiplying the vertical distance by two, and then dividing an obtained result by a side length of undistorted four-corner test graph in a vertical direction so as to obtain a vertical deformation; and
acquiring a horizontal distance between the vertex of the vertex angle of the four-corner test graph and a vertical line of the vertex angle of the active display region, multiplying the horizontal distance by two, and then dividing an obtained result by a side length of the undistorted four-corner test graph in a horizontal direction so as to obtain a horizontal deformation.

2. The testing method for the splicing screens according to claim 1 , wherein in two adjacent testing sub pictures, the testing contents of one testing sub picture include a main scale, and the testing contents of the other testing sub picture include an auxiliary scale corresponding to the main scale; and
the testing the splicing screens through the testing contents includes:
obtaining displacement parameters between two adjacent splicing screens according to the main scale and the auxiliary scale in two adjacent testing sub pictures.

3. The testing method for the splicing screens according to claim 2 , wherein the displacement parameters include a displacement difference, a first spacing is formed between scale values of the main scale, a second spacing is formed between scale values of the auxiliary scale, a total length of the main scale is greater than that of the auxiliary scale, and a difference between the first spacing and the second spacing is accuracy; and
the obtaining the displacement parameters between two adjacent splicing screens according to the main scale and the auxiliary scale in two adjacent testing sub pictures includes:
searching corresponding scale value of the main scale and scale value of the auxiliary scale in two adjacent testing sub pictures;
if the scale value of the main scale is equal to the scale value of the auxiliary scale, setting a product of the equal scale value and the accuracy as the displacement difference; and
if the scale value of the main scale is unequal to the scale value of the auxiliary scale, multiplying a difference between the scale value of the main scale and the scale value of the auxiliary scale by the first spacing, adding a multiplying result with a product of the scale value of the auxiliary scale and the accuracy, and obtaining an absolute value of an adding result so as to obtain the displacement difference.

4. The testing method for the splicing screens according to claim 2 , wherein the displacement parameters include a displacement direction, the scale values of the main scale are symmetrically arranged with a center point as a center, and the scale values of the auxiliary scale are symmetrically arranged with a center point as a center; and
the obtaining the displacement parameters between two adjacent splicing screens according to the main scale and the auxiliary scale in two adjacent testing sub pictures includes:
searching corresponding scale value of the main scale and scale value of the auxiliary scale in two adjacent testing sub pictures; and
in the corresponding scale value of the main scale and the scale value of the auxiliary scale, if the scale value of the main scale is greater than or equal to the scale value of the auxiliary scale, determining one side of a center point, at which the corresponding scale value of the main scale and the scale value of the auxiliary scale are positioned, as the displacement direction.

5. The testing method for the splicing screens according to claim 2 , wherein shapes of the main scales and the corresponding auxiliary scales include a straight line shape, a concentric circle shape or a rectangular-ambulatory-plane shape.

6. The testing method for the splicing screens according to claim 2 , wherein one or a plurality of main scales and one or a plurality of corresponding auxiliary scales are formed in two adjacent testing sub pictures.

7. The testing method for the splicing screens according to claim 1 , wherein in two adjacent testing sub pictures, the testing contents of one testing sub picture include a first gray scale comparison card, and the testing contents of the other testing sub picture include a second gray scale comparison card corresponding to the first gray scale comparison card; and
the testing the splicing screens through the testing contents includes:
comparing the first gray scale comparison card with the second gray scale comparison card so as to judge whether gray scales of two adjacent testing sub pictures are the same.

8. The testing method for the splicing screens according to claim 1 , wherein in two adjacent testing sub pictures, the testing contents of one testing sub picture include a first chromaticity comparison card, and the testing contents of the other testing sub picture include a second chromaticity comparison card corresponding to the first chromaticity comparison card; and
the testing the splicing screens through the testing contents includes:
comparing the first chromaticity comparison card with the second chromaticity comparison card so as to judge whether chromaticities of two adjacent testing sub pictures are the same.

9. The testing method for the splicing screens according to claim 1 , wherein the testing contents of four adjacent testing sub pictures include a testing line respectively, and four testing lines are sequentially and adjacently arranged; and
the testing the splicing screens through the testing contents includes:
judging whether the four testing lines intersect at one point; and
if the four testing lines do not intersect at one point, determining that splicing centers of four adjacent splicing screens do not correspond mutually.

10. The testing method for the splicing screens according to claim 3 , wherein shapes of the main scales and the corresponding auxiliary scales include a straight line shape, a concentric circle shape or a rectangular-ambulatory-plane shape.

11. The testing method for the splicing screens according to claim 4 , wherein shapes of the main scales and the corresponding auxiliary scales include a straight line shape, a concentric circle shape or a rectangular-ambulatory-plane shape.

12. The testing method for the splicing screens according to claim 3 , wherein one or a plurality of main scales and one or a plurality of corresponding auxiliary scales are formed in two adjacent testing sub pictures.

13. The testing method for the splicing screens according to claim 4 , wherein one or a plurality of

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Tieshi
• Chen Saihua
• Wang Xuefei
• Teng Wanpeng
• Di Heliang
• Du Zhihong
• Zhou Shanshan

Classifications

• H04N17/045 Primary

  Self-contained testing apparatus · CPC title

• G09G2300/026

  Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions · CPC title

• G09G2330/10

  Dealing with defective pixels · CPC title

• H04N17/04

  for receivers · CPC title

• G09G3/006

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title